辽东山区日本落叶松生物量相容性模型的研究

基于60株辽东山区日本落叶松样木生物量的实测数据,分析不同林龄条件下立木各部分生物量的变化情况,并应用度量误差方法建立立木相容性生物量模型.结果表明：树叶、树枝、树皮生物量占总生物量的比值随林龄增长呈下降趋势,干材占总生物量的比值随林龄增长呈上升趋势.在筛选出总生物量与各分量最优独立模型的基础上,应用三级控制的方法建立生物量相容性模型,并采用加权回归方法消除总量和各分量模型的异方差.建立的总量、地上部分、树干、干材、树皮生物量模型,其R2均大于0.9;树根、树冠、树叶和树枝生物量的R2略低,介于0.7～0.9之间.通过独立样本对模型的相容性和预测精度进行检验,各分量预测值所占总生物量的百分比之...

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Bibliographic Details
Published in林业科学研究 Vol. 27; no. 2; pp. 142 - 148
Main Author 黄兴召 孙晓梅 张守攻 陈东升
Format Journal Article
LanguageChinese
Published 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091 2014
Subjects
度量误差模型
日本落叶松
生物量
相容性
biomass
error-in-variable model
生物量
Larix kaempferi
日本落叶松
相容性
compatibility
度量误差模型
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ISSN1001-1498

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Summary:基于60株辽东山区日本落叶松样木生物量的实测数据,分析不同林龄条件下立木各部分生物量的变化情况,并应用度量误差方法建立立木相容性生物量模型.结果表明：树叶、树枝、树皮生物量占总生物量的比值随林龄增长呈下降趋势,干材占总生物量的比值随林龄增长呈上升趋势.在筛选出总生物量与各分量最优独立模型的基础上,应用三级控制的方法建立生物量相容性模型,并采用加权回归方法消除总量和各分量模型的异方差.建立的总量、地上部分、树干、干材、树皮生物量模型,其R2均大于0.9;树根、树冠、树叶和树枝生物量的R2略低,介于0.7～0.9之间.通过独立样本对模型的相容性和预测精度进行检验,各分量预测值所占总生物量的百分比之和为1,模型完全相容;根、冠、叶和枝的模型预测精度略低于90％,其他部位模型的预测精度都在95％以上,模型的预测精度较高.
Bibliography:Larix kaempferi ; biomass ; error-in-variable model ; compatibility
11-1221/S
Based on the biomass data of 60 sampling trees of Larix kaempferi in mountainous area of eastern Liaoning Province,the biomass of each component with different ages was analyzed.The compatible models for the biomass of whole tree and each component were established using non-linear error-in-variable modeling method.The results showed that the biomass ratio of needle,branch and bark dropped with stand age growth,but that of stem rose up with stand age growth.Based on the optimal model,the compatible models for whole tree,biomass and each component were established by three-step control programs,and the heteroscedasticity of the models for whole tree and components was eliminated with weighted regression.The determination coefficients of whole tree,above-ground,trunk,stem and bark biomass were higher than 0.9.The determination coefficients of root,crown,foliage and branch ranged from 0.7 to 0.9.From the model tested by independent sampl
ISSN:1001-1498